Sonography Principles and Instrumentation (SPI) Practice Exam

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• Which of the following structures demonstrates the highest attenuation coefficient?
• What is the primary function of Doppler ultrasound?
• The use of contrast agents in ultrasound is primarily aimed at improving what?
• What is primarily affected by increased penetration depth in ultrasound imaging?
• What does contrast resolution allow the sonographer to distinguish?
• Which of the following correctly defines acoustic frequency?
• Which ultrasound parameter is essential for minimizing the risk of aliasing in image acquisition?
• An early gate time means the sample volume is placed:
• In sonography, what term refers to the area where the ultrasound beam is most focused?
• Which of the following parameters can be adjusted to enhance the contrast resolution of an image?
• What is the significance of the ultrasound beam's focal zone?
• Which type of artifact can mimic true pathology in imaging?
• What does the term "frequency" indicate in ultrasound technology?
• What principle explains the formation of a beam from an aperture?
• Which component is responsible for regulating the amplitude of the received signal in an ultrasound system?
• What is the role of a transducer in an ultrasound system?
• Which application would typically NOT use sonography for imaging?
• What principle is designed to reduce the likelihood of bioeffects from acoustic energy?
• What happens to temporal resolution if the number of scan lines increases?
• To overcome range ambiguity, the:
• What are sonographic artifacts?
• Firing delays found in array systems are determined by the:
• Which factor primarily influences the lateral resolution in ultrasound?
• What is a disadvantage of depleted imaging?
• What does "dynamic range" refer to in the context of ultrasound imaging?
• What does the mechanical index (MI) indicate in ultrasound?
• The portion of time a transducer is transmitting a pulse is referred to as:
• Which property is frequency directly proportional to?
• Which parameter is NOT essential for image optimization in sonography?
• Which aspect is crucial for maintaining good image quality in ultrasound imaging?
• What is the purpose of time gain compensation (TGC) control?
• Transmission of the sound wave from one medium to the next is determined by:
• During reception, diagnostic ultrasound transducers convert what type of energy?
• What is the effect of increased attenuation on ultrasound imaging?
• As the transducer diameter increases, what happens to the divergence in the far field?
• What is the effect on the intensity if the amplitude of a wave triples?
• Which color always represents the baseline in color Doppler imaging?
• Which of the following are even harmonic frequencies of a 2-MHz Tx?
• In ultrasound, what term describes the ability to distinguish different tissue types?
• What is the main purpose of a quality assurance program in ultrasound?
• In Doppler ultrasound, which factor is crucial for calculating blood flow velocity?
• What type of waves does an ultrasound machine use?
• How is the intensity of ultrasound typically measured?
• What is the likely consequence of setting the PRF too high?
• What is the effect of increasing the frequency of the transducer on spatial resolution?
• Specular reflections occur when the sound wave strikes which type of surface?
• What is the primary benefit of using Doppler ultrasound?
• The factor that reduces side lobe artifact is:
• Which factor is most significant in determining the attenuation of ultrasound waves?
• What type of artifact is characterized by parallel equally spaced lines?
• What does a high mechanical index indicate in ultrasound?
• How does tissue harmonic imaging improve image quality?
• The resistance of the arterioles accounts for what percentage of the total systemic resistance?
• Brightening of echoes in the focal zone is a result of:
• What is the primary purpose of using harmonics in ultrasound imaging?
• Which of the following instruments generates the pulse of sound?
• How can a sonographer improve lateral resolution?
• What is lateral resolution in the context of ultrasound?
• If the amplitude of a wave is doubled, how does this affect the intensity?
• What is the primary purpose of using a coupling gel in ultrasound?
• Mirror imaging artifact is a result of a(n):
• What type of imaging uses ultrasound for therapeutic purposes?
• What precaution is necessary to observe hygiene protocols during ultrasound examinations?
• How wide are the elements of a linear phased-array transducer?
• What is the primary role of the transducer in ultrasound imaging?
• What is the term for the strength of the signal represented in ultrasound?
• Which pulse wave transducer displays a trapezoidal image?
• What is the decimal equivalent of the binary number 0010011?
• How does increasing the number of focal zones affect imaging?
• What is an effect of increasing duty factor in pulse ultrasound?
• What does "interpolation" refer to in ultrasound imaging?
• Which of the following are the two main categories of ultrasound imaging techniques?
• Depth gain compensation is essential to counteract what?
• The decibel is the unit of measurement for?
• Approximately what percentage of the sound beam reflects from a media boundary with perpendicular incidence, when the impedances are different?
• Which transducer will produce a longer focal length, assuming crystal diameter remains constant?
• The greater the impedance difference between two structures, the greater the:
• Which factor does NOT significantly influence the attenuation of ultrasound in tissues?
• Where is additional focusing of the sound beam available?
• Why is monitoring device output levels important during ultrasound examinations?
• What is the primary objective of the matching layer in ultrasound transducers?
• What is the minimum number of memory bits necessary to display how many shades of gray?
• What effect does increasing the frequency of ultrasound waves have on penetration depth?
• The Reynolds number is useful in predicting the onset of which phenomenon?
• How is "differential diagnosis" used in ultrasound imaging?
• Which parameter does NOT affect the spatial resolution in ultrasound imaging?
• Which factor primarily affects the Doppler frequency shift in ultrasound?
• Propagation speed less than that of soft tissue will place reflectors too:
• What does spatial resolution depend on in ultrasound imaging?
• To maintain patient safety, what should be ensured about the ultrasound gel used during examinations?
• What does "S-N ratio" stand for in ultrasound, and why is it significant?
• What does the term "pulsed echo" refer to in sonography?
• Which type of imaging is NOT a common application of sonography?
• Which artifact is often detected due to improper patient positioning?
• Which of the following parameters affects the width of the ultrasound sector?
• What is the primary goal of quality control in ultrasound?
• What is the role of the ultrasound machine's computer system?
• What does the Nyquist criterion suggest for sampling frequency in ultrasound?
• What is the significance of regular maintenance for ultrasound equipment?
• What principle is used to measure the intensity of ultrasound?
• In ultrasound imaging, what does TGC stand for?
• Why is patient positioning crucial in ultrasound examinations?
• In terms of ultrasound imaging, what does the term 'gain' refer to?
• The ratio of the largest power to the smallest power that the ultrasound system can handle is referred to as:
• Power Doppler imaging is primarily used to display:
• The main purpose of a coupling medium in ultrasound is to:
• Which of the following is a method for overcoming aliasing?
• What is essential for achieving an optimal dynamic range in ultrasound imaging?
• Why is understanding artifacts critical for sonographers?
• Which instrument properly locates each series of reflectors in individual scan lines for storage?
• What is the purpose of the damping material in the Tx assembly?
• Which mode of ultrasound displays the amplitude of reflected signals as a function of time?
• What does the term "gain" refer to in ultrasound imaging?
• What is the significance of using harmonics in ultrasound imaging?
• Which of the following properties can be lost with improper handling of the transducer?
• Which type of resolution is most affected by wavelength?
• What is the outcome of increased acoustic power in ultrasound imaging?
• The range of frequencies contained in a pulse is termed the:
• Which factor does NOT affect the speed of sound in a medium?
• Which factor influences the intensity in the focal zone when increasing transducer frequency?
• Clutter can be reduced using which of the following controls?
• What is the phenomenon of "aliasing" in Doppler ultrasound?
• What characteristic of ultrasound describes how far a wave travels in a medium?
• Angling the color Doppler box to the right or left changes the:
• A rise in tissue temperature is significant when it exceeds:
• The number of cycles in a pulse is directly related to which of the following?
• Rayleigh scattering is most likely to occur when encountering which of the following?
• An increase in reflection amplitudes from reflectors behind a weakly attenuating structure is known as:
• What determines how much of the sound wave is reflected at the interface between two tissues?
• What does flow reversal in diastole indicate?
• The mechanical index predicts the likelihood of which phenomenon?
• What is the role of the ultrasound system's display monitor?
• Which of the following is a typical application of sonography?
• What does the term "spatial resolution" refer to in sonography?
• Line density is directly related to which of the following?
• Which parameter can be adjusted to enhance Doppler sensitivity in ultrasound examinations?
• Which imaging mode provides real-time visualization of structures?
• Placement of an echo is determined by the reflectors round trip time and:
• What term describes the maximum pressure variation in a sound wave?
• Which of the following determines the number of scan lines per frame?
• What parameter is crucial for optimizing ultrasound images?
• Which imaging technique is best suited for visualizing structures beneath a highly attenuating structure?
• Structures within the focal zone may display an improper:
• What must remain constant proximal to, at, and distal to a stenosis?
• What is the difference between B-mode and M-mode ultrasound?
• In the Fraunhofer zone, how does the beam behave?
• What condition must be met for refraction to occur?
• Why is heat sterilization of ultrasound equipment not recommended?
• The majority of imaging artifacts are likely a result of:
• Which of the following techniques uses separate transmitter and receiver elements?
• The duty factor in pulse ultrasound is primarily proportional to which of the following?
• What is the primary objective of using a linear scan transducer?
• Which of the following techniques provides quantitative data?
• What adjustment would increase the depth of field in ultrasound imaging?
• What role do contrast agents play in ultrasound imaging?
• What artifact displays a series of closely spaced echoes distal to a strong reflector?
• Contrast agents enhance visualization by increasing which of the following?
• Structures that exhibit lower amplitude echoes than surrounding tissues are termed:
• What is one of the precautions to ensure patient safety during ultrasound examinations?
• What is the principle of Doppler ultrasound based on?
• Increasing the number of scan lines in an image will generally:
• What does the term "resolution" refer to in ultrasound imaging?
• In what circumstance does the strength of echoes change significantly?
• What is the main advantage of using a linear array transducer over a curved array transducer?
• In Doppler ultrasound, what does aliasing refer to?
• How does the frequency of an ultrasound exam affect penetration depth?
• What is the typical reason for using a harmonic imaging technique in sonography?
• During which phase does the ultrasound machine prepare for the next pulse of sound?
• Which receiver function eliminates the weaker reflections?
• In a TGC curve, the delay represents which of the following?
• In Doppler ultrasound, the term "aliasing" refers to what phenomenon?
• What is a sonographer responsible for in patient care?
• What is the Doppler shift frequency proportional to?
• What is the primary purpose of sonography?
• What is the frequency range typically used in diagnostic ultrasound?
• What type of blood flow is characterized by a constant speed across the vessel?
• What role does the Fourier transform play in ultrasound?
• Focusing the sound beam:
• What does "pause time" refer to in ultrasound operations?
• The speed at which a wave travels through a medium is determined by:
• What device type is primarily used for examining blood flow within vessels?
• What does "structural imaging" involve in ultrasound?
• Which term refers to the amount of time a system takes to complete one cycle of ultrasound?
• In which area is sonography commonly applied?
• A hydrophone is an instrument used to measure:
• Increasing the frequency will:
• Ultrasound propagation speed is generally slower in which of the following substances?
• What is the primary purpose of harmonics in ultrasound imaging?
• What is the primary difference between continuous wave and pulsed wave ultrasound?
• What is a common cause of shadowing artifact in ultrasound?
• Which parameter influences the amount of attenuation in ultrasound?
• Which Doppler angle yields the greatest Doppler shift?
• Which factor influences the quality of ultrasound images significantly?
• For an unfocused transducer, two near zone lengths are equal to the: